I'm also facing the exact same problems with a Ryzen 5500, MSI B350M Gaming Pro, 2x8Gb Crucial 3200 CL16, RTX 3060 Ti, and both a PCIe Sound Blaster Z and a USB Realtek ALC4040.
The most frustrating part is that this crackling also causes channel swap with Creative products using the SoundCore3D chip.
The only solutions I have found to mitigate this problem are:
- Setting RAM speed to 2133MHz/1067 FCLK if your ram is in dual channel, or only using one stick in single channel.
- Setting GPU PCIe bandwidth to pcie 2.0 x16 or 3.0 x8.
- Running Prime95 with Large FFTs.
The easiest way I've found to trigger the issue is to play a video, or an audio file in ASIO if you have it, and scroll through a PDF with images in Edge at the same time.
I only started experiencing this problem after switching from an RX 590 to an RTX 3060 Ti. It also doesn't happen if I put my old 1600 AF back with the exact same configuration.
The most affected games for me are Rocket League, Genshin Impact and The Witcher 3 since the next gen update. It still happens in other games, but less frequently.
I think it's safe to say that it's not related to EMI at all, and could be related to a limitation of the Infinity Fabric/Memory controller on Cezanne chips.